Abba's Bjorn Ulvaeus has confessed he hated some of the bands stage costumes so much they made him feel ill.
The 67-year-old singer-songwriter made the revelation as he announced the opening of Abba The Museum, a venue dedicated to the Swedish quartet, which will be part of the Swedish music hall of fame opening in Stockholm next spring.
Bjorn revealed Abba members had helped contribute to the exhibition by emptying their closets of long-forgotten stage clothes, including 70s-style plateau boots and shiny costumes - some of which he would rather forget.
He said: "I had one costume that I particularly remember that was some kind of Superman leotard with a cape. It makes me sick when I see it."
The museum will feature costumes, instruments and other mementos that were displayed in the AbbaWorld exhibition that toured Europe and Australia in 2009-2011.
Bjorn revealed he hoped all four former Abba members would attend the opening, set for April or May.
He said: "We are the only group of that status that has never been reunited. I think that is cool. It is a strength for Abba that you remember those young, ambitious, energetic people during the 70s rather than some feeble old folks who feel compelled to get up and play all the time."
The other band members were Benny Andersson, Agnetha Faltskog and Anni-Frid Lyngstad. They started the band as two married couples, consistently topping charts in the English-speaking world after winning the 1974 Eurovision Song Contest with Waterloo. They continued performing after both couples divorced, but drifted apart in the early '80s.
"We quit at the absolute top," Bjorn said. "And when we stopped it was to take a break and do some other things and then get back together again. But it never turned out that way."